CVE-2023-41332 Information

Description

Cilium is a networking observability and security solution with an eBPF-based dataplane. In Cilium clusters where Cilium’s Layer 7 proxy has been disabled creating workloads with policy.cilium.io/proxy-visibility annotations (in Cilium >= v1.13) or io.cilium.proxy-visibility annotations (in Cilium <= v1.12) causes the Cilium agent to segfault on the node to which the workload is assigned. Existing traffic on the affected node will continue to flow but the Cilium agent on the node will not able to process changes to workloads running on the node. This will also prevent workloads from being able to start on the affected node. The denial of service will be limited to the node on which the workload is scheduled however an attacker may be able to schedule workloads on the node of their choosing which could lead to targeted attacks. This issue has been resolved in Cilium versions 1.14.2 1.13.7 and 1.12.14. Users unable to upgrade can avoid this denial of service attack by enabling the Layer 7 proxy.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Reference

https://github.com/cilium/cilium/pull/27597 https://github.com/cilium/cilium/security/advisories/GHSA-24m5-r6hv-ccgp

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

LOW

Base Severity

3.5